Method for producing an asphalt shoulder

Abstract

The invention relates to a method for producing an asphalt shoulder, comprising the steps of: a) milling out a section of the existing shoulder; b) applying asphalt to the milled area; c) rolling the applied asphalt while hot; characterized in that, in step a), a groove extending in the longitudinal direction of the road is milled into the surface of the milled area; in step b), the milled groove is filled with asphalt along with the remainder of the milled area; and in step c), a groove is embossed into the shoulder, comprising grooves extending transversely to the longitudinal direction of the road. A further aspect of the invention relates to a device for producing such an asphalt shoulder.

Description

Field of invention

[0001] The invention relates to a method for producing an asphalt shoulder, a device for carrying out such a method, and an asphalt shoulder produced therein. State of the art

[0002] Road shoulders are subject to increased stress nowadays due to higher traffic volumes, unauthorized driving, and increasingly frequent heavy rainfall events. The resulting damage, such as exposed asphalt edges or potholes often 10 to 15 cm deep, poses an increased risk of falls, especially for cyclists and pedestrians.

[0003] Grass pavers, concrete elements, plastic grids, or cast-in-place concrete poured using a concrete pouring machine do not represent a sustainable solution for constructing a road shoulder, as these materials must be disposed of as hazardous waste during future repairs or new construction. Furthermore, it must be considered that cast-in-place concrete or other concrete materials expand differently than asphalt, which can quickly lead to cracks or bulges that cause further damage and risks.

[0004] DE202020102685U1 describes a device for producing a roadway made of concrete or asphalt, which imprints profiles running perpendicular to the direction of travel into the road surface in certain areas, so that a vibrating shoulder is created.

[0005] EP3739123A1 describes a mobile device for producing a road shoulder from asphalt, which rolls an embossing into the asphalt surface.

[0006] DE102021100992A1 describes a precast concrete block for constructing a paved road shoulder. The block has a profiled surface and two grooves oriented longitudinally to the roadway on its underside to ensure stability in the transverse direction of the roadway.

[0007] DE102015108238A1 describes a shoulder slab for the fastening and securing of roads in the edge area by means of a slab-like segment which is provided on the upper surface with groove-like depressions running transversely to the direction of travel of the road.

[0008] DE102011054472A1 describes a method for manufacturing a load-bearing element with a pipe that can be used in winter to keep the road free of snow or ice by passing a heated fluid through the pipe system.

[0009] However, such approaches do not offer long-lasting durability for the newly installed road shoulder, are generally time-consuming and generate large amounts of hazardous waste, thus failing to solve any of the problems described above.

[0010] Therefore, there is a need for a solution on how to produce a road shoulder that maintains good stability and durability even under heavy use, quickly and easily, and without using contaminants that must be disposed of as hazardous waste. Description of the invention

[0011] The object of the present invention is to enable the rapid and simple production of an asphalt road shoulder that exhibits good stability and durability under high stress, and in which the production process does not require the disposal of contaminants that would otherwise be classified as hazardous waste. This object is achieved by the method and the apparatus according to the independent claims.

[0012] The invention relates to a method for producing an asphalt road shoulder adjacent to the road surface, comprising the steps of: a) milling out the existing road shoulder in the longitudinal direction of the road, removing an edge region of the road surface to form a recess with a predetermined width and a level surface, wherein the milled road surface forms a side wall of the recess; b) applying asphalt in the recess; and c) rolling the applied asphalt while hot using an embossing roller to imprint a pattern into the asphalt road shoulder thus produced; wherein, during the milling in step a), a groove extending in the longitudinal direction of the road is milled into the level surface of the recess. The groove-like groove milled into the level surface causes an interlocking with the asphalt layer of the asphalt shoulder applied thereon.This, in turn, prevents the asphalt shoulder from shifting due to intensive use and heavy rainfall. The grooves embossed into the hot asphalt create a rumbling sound when driven over, serving as a warning and deterrent to not drive on it for too long. Furthermore, the grooves help rainwater drain quickly from the road, reducing the risk of vehicles skidding. Because the asphalt shoulder is also made of ordinary asphalt, no contaminants or hazardous waste are generated during repairs, as it can be mixed with the road surface and reused or covered with a new layer of asphalt, since asphalt bonds with asphalt. This is not the case with concrete or plastic materials.

[0013] Preferably, the milled recess formed in step a) slopes downwards from the milled road surface away from the road. This creates the necessary gradient of the asphalt shoulder so that rainwater can flow laterally through the embossed grooves. This prevents water from accumulating on the road and shoulder, improving the overall usability of the road and the durability of the shoulder. Furthermore, the water's tendency to run off the road is reduced or eliminated entirely. The embossed grooves also act as a warning to vehicles driving on the shoulder, thus reducing overall use of the shoulder.

[0014] In the milled recess formed in step a), the angle between the side wall of the recess and the surface of the recess is preferably between 85° and 95°. Preferably, the angle is 90°. A recess with uniform, right-angled edges facilitates easier and more even filling with asphalt. This also contributes to structural strength and simplifies renovation.

[0015] Preferably, the width of the milled recess formed in step a) is between 40 and 60 cm. Preferably, the width is 50 cm. This is an optimal width that provides sufficient space for milling a recess according to the inventive method without wasting area and material.

[0016] Preferably, the depth of the milled recess formed in step a) is 6 to 10 cm, measured from the surface of the road surface to the base of the recess. More preferably, the depth of the milled recess formed in step a) is 6 to 12 cm, and particularly preferably 8 to 10 cm. This depth provides an optimal ratio to the recess to ensure the necessary support and anchorage that prevents the lateral displacement of the road shoulder from the roadway.

[0017] According to step b), the recess is preferably milled into the surface of the milled-out area to a depth of 3 to 7 cm. Preferably, the depth is 5 cm. Such dimensions are optimal for the intended functionality and stability of the asphalt shoulder. The inventor has found that, particularly with these dimensions, the interlocking of the applied asphalt with the milled, groove-like recess is optimal. According to step a), the recess is preferably milled into the surface of the milled-out area in the form of a groove-like or V-shaped recess.

[0018] Another aspect of the invention is an asphalt shoulder produced according to the inventive method. Since the road shoulder is also made of asphalt, it can be covered with a new asphalt surface during subsequent repairs, as asphalt bonds with asphalt.

[0019] A further aspect of the invention is a device for producing such an asphalt shoulder, comprising a mobile carrier vehicle capable of traveling in the longitudinal direction of the road, with a milling device projecting laterally from the carrier vehicle, which mills out a surface on the existing shoulder, wherein i) the milling device rotates about an approximately horizontal axis oriented transversely to the longitudinal direction of the road and the inclination of the milling device can be adjusted, in particular in a range of 0 to 20%; ii) the milling depth of the milling device is variably adjustable, in particular in a range of 0 to 20 cm; and iii) the milling device has at least one bulge in its outer contour, so that a depression, in particular a groove-shaped depression, is milled into the surface of the milled area.The carrier vehicle drives along the roadside, and the milling unit is attached to the side of the vehicle, making it possible to mill the shoulder from the road without driving on it. This allows optimal conditions for asphalt paving not only at the edge of the roadway but also along the sides of the roadway. Brief description of the characters Fig. Figure 1 shows a cross-section of a milled-out section of an existing road shoulder according to the present invention. Description of preferred embodiments

[0020] Fig.Figure 1 shows a preferred embodiment of a milled recess 1 in an existing road shoulder. A 50 cm wide recess 1 is milled longitudinally along the road surface 2, the recess 1 being inclined downwards from the milled road surface (i.e., away from the road) such that an angle 5 between the side wall of the recess formed by the milled road surface 2 and the surface 3 of the recess is approximately 90°. The depth of the recess 1 is 8 cm in this case. Simultaneously, a 5 cm deep V-shaped depression 4 is milled into the surface 3 of the recess, also longitudinally. When an asphalt layer is applied to the recess 1, including the milled depression 4, the depression 4 interlocks with the applied asphalt layer, preventing lateral migration of the asphalt of the newly created road shoulder.This in turn prevents the formation of cracks and holes between the newly installed shoulder and the road surface 2 of the road. Reference symbol list 1 milling 2 Road surface 3. Planum of the milled-out area 4 milled recesses 5 angles formed by the side wall of the milled-out area and the surface of the milled-out area

Claims

[1] Method for producing an asphalt road shoulder adjacent to the road surface, comprising the steps of: a) Milling out the existing road shoulder in the longitudinal direction of the road, milling off an edge area of ​​the road surface to form a milling out with a predetermined width and a level surface, wherein the milled road surface forms a side wall of the milling out; b) Applying asphalt to the milled-out area; c) Rolling the applied asphalt while hot using an embossing roller to imprint an embossing into the asphalt road shoulder thus produced; characterized by , that During milling in step a), a depression running in the longitudinal direction of the road is milled into the surface of the milled-out area. [2] Method according to claim 1, wherein the milling formed in step a) is inclined downwards from the milled road surface in the direction away from the road. [3] Method according to claim 1 or 2, wherein in the milling formed in step a) the angle between the side wall of the milling and the planum of the milling is approximately 90° (between 85° and 95°). [4] Method according to one of the preceding claims, wherein the width of the milling formed in step a) is between 40 and 60 cm. [5] Method according to one of the preceding claims, wherein the depth of the milling formed in step a) is 6 to 12 cm, measured from the surface of the road surface to the level of the milling. [6] Method according to one of the preceding claims, wherein according to step a) the recess is milled into the planum of the milled-out to a depth of 3 to 7 cm. [7] Method according to one of the preceding claims, wherein according to step a) the recess is milled into the planum of the milled-out in the form of a groove-like or V-shaped recess. [8] Road shoulder made of asphalt produced according to any of the preceding claims. [9] Device for producing an asphalt shoulder according to one of the preceding claims, comprising a mobile carrier vehicle capable of driving in the longitudinal direction of the road with a milling device projecting laterally from the carrier vehicle, which mills out a surface on the existing shoulder, wherein i) the milling device rotates about an approximately horizontal axis oriented transversely to the longitudinal direction of the road at an angle of approximately 90° (between 85° and 95°). ii) the milling depth of the milling device is variably adjustable, in particular in a range of 0 to 20 cm; and iii) the milling device has at least one bulge in its outer contour, so that a recess, in particular a groove-shaped recess, is milled into the planum of the milled surface.

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